Chitosan-diaphragm based optical-fiber hydrophone for in-vivo ultrasound measurements

L. H. Chen; C. C. Chan; X. M. Ang; K. C. Leong

doi:10.1117/12.870188

9 November 2010 Chitosan-diaphragm based optical-fiber hydrophone for in-vivo ultrasound measurements

L. H. Chen, C. C. Chan, X. M. Ang, K. C. Leong

Proceedings Volume 7853, Advanced Sensor Systems and Applications IV; 78530M (2010) https://doi.org/10.1117/12.870188
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

The purpose of this work is the development of a high sensitivity and biocompatibility Fiber-Optic hydrophone for invivo ultrasound measurements. The selected sensing element- chitosan diaphragm allows matched-load condition due to its relatively permeable property. Chitosan is a natural polysaccharide which considered as biocompatible and biodegradable material that can be safe in performing the in-vivo measurement. The configuration of the sensor is based on the fiber-optic Fabry-Perot interferometry which offers good spatial resolution in the tens of MHz range [1] and robust response. Significant applications of the proposed sensor are in vivo micro-imaging [2], in-vivo lithotripsy measurement [3] or event the laboratory characterization of medical ultrasound sources. In this paper, the performance of the sensor is characterized by comparison with a PVDF needle hydrophone in term of sensitivity, frequency response and directivity.

Citation Download Citation

L. H. Chen, C. C. Chan, X. M. Ang, and K. C. Leong "Chitosan-diaphragm based optical-fiber hydrophone for in-vivo ultrasound measurements", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78530M (9 November 2010); https://doi.org/10.1117/12.870188

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